English: A photograph of the radioactive source involved in the 1987 accident in Goiânia, Brazil. The cesium source was sold to a junkyard, whose owner cut open its protective steel and lead casing. Inside he was fascinated to discover the radioactive powder that glittered and glowed blue in the dark. The cesium chloride spread undetected for over two weeks. Some 250 people were contaminated and four died in the first month. The event focused international attention on the issue of safety standards for radioactive sources. Its lessons still shape national and global actions decades later. (Goiânia, Brazil, 6 October 2007) Photo Credit: IAEA